Dell PowerConnect B - MLXe 16, Руководство по установке оборудования

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PowerConnect B-MLXe Hardware Installation Guide 107
53-1002111-01
Managing the cooling system
5
Managing the cooling system
This section provides configuration, management, and monitoring information about router cooling
systems.
Configuring the cooling system
Your router is pre-configured with default settings for all cooling system parameters. Although no
initial configuration of the cooling system is necessary, you can change the settings of the following
cooling system parameters:
•
Low and high temperature thresholds for modules and fan speeds
•
Interval at which the system polls the temperature sensors on the module for a reading
Changing temperature thresholds for modules and fan speeds
The cooling system includes fans that operate at four speeds: low, medium, medium-high, and
high. In general, each fan speed, (except for low), has a low and high temperature threshold
associated with it, as shown in
Figure 64 . The low fan speed has a high temperature threshold only.
FIGURE 64
Fan speeds and temperature thresholds
The low and high temperature thresholds allow the router to determine the speed at which the fans
should operate. In general, the fans operate according to these guidelines:
•
If the temperature of all modules falls between the low and high thresholds for a fan speed, the
fan continues to operate at that speed.
•
If the temperature of a management module, switch fabric module, or two interface modules
exceeds the high threshold specified for a fan speed, the fan changes to the next higher speed.
If the temperature of any of the modules exceeds the high threshold for the high speed, the
router shuts down the modules to prevent damage. The router also sends a warning message
to the system log and an SNMP trap. For information about viewing the warning messages,
refer to
“Displaying temperature warnings” on page 112.
•
The frequency with which the temperature is checked is determined by the setting of the
temp-poll-period command. For information about temp-poll-period command, refer to
“Changing the temperature polling interval” on page 110.
•
If the temperature of a management module, switch fabric module, and interface modules
falls below the low threshold for a fan speed, the fan changes to the next lower speed. If the
temperature of all modules falls below the high threshold for the low speed, the fan operates
at the low speed.
Operating
Temperature
Medium
Speed
Low Speed
Med-High
Speed
High
Speed
50 55 60 65 70 75 80 85 90 95
High, 60 deg.
Low 57, deg. High, 70 deg.
Low, 67 deg. High, 80 deg.
Low, 77 deg. High, 85 deg.